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- UR 6DH
- Digital I/O Module
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- 120 × 30 × 100 mm
- 0.9 kg
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Product Overview
The GE UR 6DH Multilin UR Series Digital I/O Module is a digital I/O component used within compatible GE Multilin UR Series protection and control equipment. It provides the physical interface between discrete external signals and the relay’s internal processing architecture.
In a typical protection system, the relay needs to monitor equipment conditions such as breaker position, auxiliary contacts, switch states, alarms, and interlocks. Digital I/O hardware allows these binary conditions to become part of the relay’s configured protection and automation logic.
The UR 6DH works as part of the host relay rather than functioning as an independent controller. Its application depends on the specific UR Series device, I/O configuration, field wiring, and control requirements.
For maintenance applications, the existing module position and signal assignments should be recorded before replacement. This is particularly useful when the relay has been operating for an extended period and its original wiring has been modified or expanded.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE |
| Model | UR 6DH |
| Product Family | Multilin UR Series |
| Product Type | Digital I/O Module |
| Primary Function | Digital Signal Interface |
| System Role | Discrete I/O |
| Application | Protection and Control Systems |
| Installation | GE Multilin UR Series Devices |
| Dimensions | 120 × 30 × 100 mm |
| Weight | 0.9 kg |
Product Features
The UR 6DH is intended for discrete signal interfacing within compatible GE Multilin UR Series equipment.
Key characteristics include:
- GE Multilin UR Series digital I/O module
- Model UR 6DH
- Provides discrete signal interfacing
- Connects external equipment with relay functions
- Supports equipment status monitoring
- Suitable for breaker and switchgear applications
- Supports alarm and interlock circuits
- Integrates with configured relay logic
- Works within the UR Series I/O architecture
- Suitable for maintenance and replacement applications
The actual function of the I/O points depends on the host relay configuration and the external circuits connected to the module.
Working Principle
The UR 6DH forms part of the discrete signal path between external equipment and the processing system of a Multilin UR Series relay.
A simplified relationship is:
External Equipment → UR 6DH → UR Series Processor → Protection / Control Logic → External Control Circuit
Binary conditions from external equipment are transferred through the applicable digital I/O circuits to the relay’s processing system. The processor can evaluate these conditions alongside protection elements, alarms, interlocks, and other configured logic.
When a defined condition is met, the relay’s control logic can initiate the corresponding response through the configured control architecture.
This arrangement allows physical equipment states to interact with programmable protection and automation functions without requiring a separate control system for every discrete signal.
Role in a Multilin UR Protection Architecture
The UR 6DH occupies the digital I/O interface layer within the Multilin UR Series architecture.
A simplified control path can be viewed as:
Field Equipment → Digital I/O → UR Processor → Protection / Automation Logic → Control Equipment
| System Layer | Typical Function |
|---|---|
| Field Equipment | Provides equipment status and discrete conditions |
| Digital I/O Layer | Exchanges binary signals |
| Processing Layer | Evaluates incoming conditions |
| Protection Layer | Executes configured protection functions |
| Automation Layer | Handles control and interlocking |
| Output Layer | Transfers commands to external circuits |
| Supervisory Layer | Monitors relay status and events |
The digital I/O layer allows external equipment information to be incorporated into the relay’s overall protection strategy.
For example, equipment status can be used as an input to an interlock or control sequence, allowing the relay to determine whether a particular operation should be permitted.
Industrial Applications
The UR 6DH can be used in protection and automation installations based on compatible GE Multilin UR Series equipment.
| Application | Typical Use |
|---|---|
| Electrical Substations | Switchgear status monitoring |
| Power Generation | Generator control interfaces |
| Distribution Systems | Feeder equipment monitoring |
| Transmission Systems | Protection interlocking |
| Motor Protection | Contactor and auxiliary signals |
| Transformer Protection | Alarm and control circuits |
| Industrial Power Systems | Equipment interlocks |
| Utility Automation | Discrete monitoring and control |
The actual application depends on the host relay model, I/O configuration, and connected electrical equipment.
Installation and Maintenance
Before replacing a UR 6DH, technicians should identify the host relay and document the existing I/O configuration. This helps prevent incorrect wiring or signal assignment during maintenance.
Recommended checks include:
- Confirm the complete UR 6DH model.
- Identify the host Multilin UR Series relay.
- Verify module compatibility.
- Record the module position.
- Document digital signal assignments.
- Identify connected equipment.
- Record breaker, switch, alarm, and interlock circuits.
- Isolate the relevant control circuits before replacement.
- Inspect connectors and terminals.
- Check field wiring for damage or loose connections.
- Verify correct module positioning.
- Ensure connectors are fully seated.
- Restore system connections according to the applicable procedure.
- Check expected digital signal states.
- Verify configured control functions.
- Review relay diagnostics.
- Confirm normal operation of associated equipment.
If a digital signal remains abnormal after replacement, the complete circuit should be checked. External contacts, control voltage, wiring, terminal connections, configuration, and downstream equipment can all affect the final signal seen by the relay.
Related Components
The UR 6DH operates as part of a wider Multilin UR Series protection and control architecture.
| Component | Function |
|---|---|
| UR Series Protection Relay | Provides protection and control functions |
| UR 6DH | Provides digital I/O interfacing |
| UR 6CV | Provides digital I/O functions |
| UR 6CH | Provides digital I/O functions |
| UR 6AH | Provides digital I/O combination functions |
| UR 5CH | Interfaces transducer-related signals |
| UR 1HH | Provides relay operating power |
| Processor Module | Executes protection and control logic |
| Breaker / Switchgear | Provides status and receives commands |
| Auxiliary Contacts | Supply equipment position signals |
| Communication Interface | Connects the relay with supervisory systems |
The appropriate module should be selected according to the required I/O function and compatibility with the host relay.
Recommended Related Models
For GE Multilin UR Series installations, related models can be considered according to their specific system roles.
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| GE UR 6DH | Digital I/O Module | Discrete signal interfacing |
| GE UR 6CV | Digital I/O Module | Digital signal interface |
| GE UR 6CH | Digital I/O Module | Digital signal interface |
| GE UR 6AH | Digital I/O Combination Module | Digital status and control |
| GE UR 5CH | Transducer I/O Module | Transducer signal interface |
| GE UR 1HH | Power Supply Module | Relay power infrastructure |
These modules may serve different functions within the UR Series architecture. Selection should therefore be based on the required signal type and host relay configuration rather than physical appearance alone.
Key Advantages
- GE Multilin UR Series digital I/O hardware
- Model UR 6DH
- Provides discrete signal interfacing
- Connects external equipment with relay logic
- Supports equipment status monitoring
- Suitable for breaker and switchgear applications
- Supports alarm and interlock functions
- Integrates with configured protection and control logic
- Suitable for utility and industrial power systems
- Useful for maintenance and replacement applications
Technical FAQs
How does the UR 6DH fit into a GE Multilin UR protection system?
The UR 6DH forms part of the relay’s digital I/O architecture, connecting discrete external equipment conditions with the processor and configured protection or automation logic.
What types of signals are typically associated with a digital I/O module?
Typical applications involve binary equipment conditions such as breaker position, auxiliary contact status, switch states, alarms, and interlock conditions. The exact signal assignment depends on the host relay configuration.
Why should the existing I/O configuration be documented before module replacement?
Digital I/O circuits are directly connected to external equipment and relay logic. Recording the existing signal assignments and wiring helps ensure that the replacement module is installed consistently with the original protection and control scheme.
How can an engineer distinguish an I/O module problem from an external circuit problem?
The complete signal path should be checked systematically, including control voltage, field contacts, wiring, terminals, connectors, module configuration, and relay diagnostics. Comparing the expected signal with the actual relay indication can help isolate the location of the fault.